It could just as easily be that John was a terrible father and this is her cry for attention.

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And this. Maybe the daughter just figured that it makes a lot more sense to be the dude if the choice is between being the person who does nothing at home and gets to becomes a fat slob than the person who has to take orders from that fat slob, do everything that needs to be done at home, and then has to start pedaling a bike to lose the baby weight for her fat slob ASAP after shitting out his kids.